This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A334737 #13 Jun 01 2020 14:18:10 %S A334737 1,10,2,11,19,28,4,13,37,46,20,5,14,7,16,8,17,55,23,64,22,29,73,82,38, %T A334737 47,91,25,32,26,56,31,100,40,35,34,65,41,109,118,74,83,127,136,44,49, %U A334737 43,145,50,59,154,52,58,92,67,163,172,76,85,68,94,101,181,190,77,61,199 %N A334737 Lexicographically earliest sequence of distinct positive integers such that the digital root of a(n+1) divides a(n). %H A334737 Carole Dubois, <a href="/A334737/b334737.txt">Table of n, a(n) for n = 1..5005</a> %e A334737 a(1) = 1 is divisible by the digital root of 10 (which is 1 + 0 = 1); %e A334737 a(2) = 10 is divisible by the dig. root of 2 (which is = 2); %e A334737 a(3) = 2 is divisible by the dig. root of 11 (which is 1 + 1 = 2); %e A334737 a(4) = 11 is divisible by the dig. root of 19 (which is 1 + 9 = 10 => 1 + 0 = 1); %e A334737 a(5) = 19 is divisible by the dig. root of 28 (which is 2 + 8 = 10 => 1 + 0 = 1); %e A334737 a(6) = 28 is divisible by the dig. root of 4 (which is = 4); etc. %Y A334737 Cf. A248025, A334837 (same idea, but digital sum instead of digital root in the Name section). %K A334737 base,nonn %O A334737 1,2 %A A334737 _Eric Angelini_ and _Carole Dubois_, May 09 2020